feat: seo optimization p1

app/greyscan/layout.tsx

@@ -3,8 +3,35 @@ import type { Metadata } from 'next'
 export const metadata: Metadata = {
   title: 'Greyscan | Greywall',
   description: 'Scan your repo and see what an unrestricted AI agent would attempt. Powered by Greywall.',
+  alternates: {
+    canonical: 'https://greywall.io/greyscan',
+  },
+  openGraph: {
+    title: 'Greyscan | Greywall',
+    description: 'Scan your repo and see what an unrestricted AI agent would attempt. Powered by Greywall.',
+    url: 'https://greywall.io/greyscan',
+    siteName: 'Greywall',
+    type: 'website',
+  },
+}
+
+const breadcrumbJsonLd = {
+  '@context': 'https://schema.org',
+  '@type': 'BreadcrumbList',
+  itemListElement: [
+    { '@type': 'ListItem', position: 1, name: 'Greywall', item: 'https://greywall.io' },
+    { '@type': 'ListItem', position: 2, name: 'Greyscan', item: 'https://greywall.io/greyscan' },
+  ],
 }
 
 export default function ExposureLayout({ children }: { children: React.ReactNode }) {
-  return children
+  return (
+    <>
+      <script
+        type="application/ld+json"
+        dangerouslySetInnerHTML={{ __html: JSON.stringify(breadcrumbJsonLd) }}
+      />
+      {children}
+    </>
+  )
 }